ἑταῖρος
Etym. ἔτης
"a comrade, companion, mate", Hom.; a common way of addressing people, ὦ 'ταῖρε "my good friend", Ar.; φίλ᾽ ἑταῖρε Theogn.; "pupils or disciples" were the ἑταῖροι of their masters, as those of Socrates, Xen.:—c. gen., δαιτὸς ἑταῖρε "partner" of my feast, Hhymn.; πόσιος καὶ βρώσιος ἑταῖροι mess "mates", Theogn.
2. metaph. of things, ἐσθλὸς ἑταῖρος, of a fair wind, Od.; c. dat., βίος ὁ σοφοῖς ἕταρος Anth.: as adj. "associate in" a thing, c. gen., Plat.: Sup., ἑταιρότατος id=Plat.